// xblock: utilities - reset
// ====================

// NOTES:
// * this reset is scoped to just the xblock's markup/elements. The app/system should never be touched.
// * this reset is heavily based on the good work of normalize (http://necolas.github.io/normalize.css/)

// contains all resets inside of the main xblock wrapper
.wrapper--xblock {

  // --------------------
  // porting of normalize.css v3.0.0 | MIT License | git.io/normalize
  // --------------------
  font-family: sans-serif; /* 1 */
  -ms-text-size-adjust: 100%; /* 2 */
  -webkit-text-size-adjust: 100%; /* 2 */

  /* HTML5 display definitions
     ========================================================================== */

  /**
   * Correct `block` display not defined in IE 8/9.
   */

  article,
  aside,
  details,
  figcaption,
  figure,
  footer,
  header,
  hgroup,
  main,
  nav,
  section,
  summary {
    display: block;
  }

  /**
   * 1. Correct `inline-block` display not defined in IE 8/9.
   * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
   */

  audio,
  canvas,
  progress,
  video {
    display: inline-block; /* 1 */
    vertical-align: baseline; /* 2 */
  }

  /**
   * Prevent modern browsers from displaying `audio` without controls.
   * Remove excess height in iOS 5 devices.
   */

  audio:not([controls]) {
    display: none;
    height: 0;
  }

  /**
   * Address `[hidden]` styling not present in IE 8/9.
   * Hide the `template` element in IE, Safari, and Firefox < 22.
   */

  [hidden],
  template {
    display: none;
  }

  /* Links
     ========================================================================== */

  /**
   * Remove the gray background color from active links in IE 10.
   */

  a {
    background: transparent;
  }


  /* Text-level semantics
     ========================================================================== */

  /**
   * Address styling not present in IE 8/9, Safari 5, and Chrome.
   */

  abbr[title] {
    border-bottom: 1px dotted;
  }

  /**
   * Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome.
   */

  b,
  strong {
    font-weight: bold;
  }

  /**
   * Address styling not present in Safari 5 and Chrome.
   */

  dfn {
    font-style: italic;
  }

  /**
   * Address variable `h1` font-size and margin within `section` and `article`
   * contexts in Firefox 4+, Safari 5, and Chrome.
   */

  h1 {
    font-size: 2em;
    margin: 0.67em 0;
  }

  /**
   * Address styling not present in IE 8/9.
   */

  mark {
    background: #ff0;
    color: #000;
  }

  /**
   * Address inconsistent and variable font size in all browsers.
   */

  small {
    font-size: 80%;
  }

  /**
   * Prevent `sub` and `sup` affecting `line-height` in all browsers.
   */

  sub,
  sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
  }

  sup {
    top: -0.5em;
  }

  sub {
    bottom: -0.25em;
  }

  /* Embedded content
     ========================================================================== */

  /**
   * Remove border when inside `a` element in IE 8/9.
   */

  img {
    border: 0;
  }

  /**
   * Correct overflow displayed oddly in IE 9.
   */

  svg:not(:root) {
    overflow: hidden;
  }

  /* Grouping content
     ========================================================================== */

  /**
   * Address margin not present in IE 8/9 and Safari 5.
   */

  figure {
    margin: 1em 40px;
  }

  /**
   * Address differences between Firefox and other browsers.
   */

  hr {
    -moz-box-sizing: content-box;
    box-sizing: content-box;
    height: 0;
  }

  /**
   * Contain overflow in all browsers.
   */

  pre {
    overflow: auto;
  }

  /**
   * Address odd `em`-unit font size rendering in all browsers.
   */

  code,
  kbd,
  pre,
  samp {
    font-family: monospace, monospace;
    font-size: 1em;
  }

  /* Forms
     ========================================================================== */

  /**
   * Known limitation: by default, Chrome and Safari on OS X allow very limited
   * styling of `select`, unless a `border` property is set.
   */

  /**
   * 1. Correct color not being inherited.
   *    Known issue: affects color of disabled elements.
   * 2. Correct font properties not being inherited.
   * 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome.
   */

  button,
  input,
  optgroup,
  select,
  textarea {
    color: inherit; /* 1 */
    font: inherit; /* 2 */
    margin: 0; /* 3 */
  }

  /**
   * Address `overflow` set to `hidden` in IE 8/9/10.
   */

  button {
    overflow: visible;
  }

  /**
   * Address inconsistent `text-transform` inheritance for `button` and `select`.
   * All other form control elements do not inherit `text-transform` values.
   * Correct `button` style inheritance in Firefox, IE 8+, and Opera
   * Correct `select` style inheritance in Firefox.
   */

  button,
  select {
    text-transform: none;
  }

  /**
   * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
   *    and `video` controls.
   * 2. Correct inability to style clickable `input` types in iOS.
   * 3. Improve usability and consistency of cursor style between image-type
   *    `input` and others.
   */

  button,
  html input[type="button"], /* 1 */
  input[type="reset"],
  input[type="submit"] {
    -webkit-appearance: button; /* 2 */
    cursor: pointer; /* 3 */
  }

  /**
   * Re-set default cursor for disabled elements.
   */

  button[disabled],
  html input[disabled] {
    cursor: default;
  }

  /**
   * Set opacity on buttons to 50% (which matches LMS styling).
   */

  button[disabled] {
    opacity: 0.5;
  }

  /**
   * Remove inner padding and border in Firefox 4+.
   */

  button::-moz-focus-inner,
  input::-moz-focus-inner {
    border: 0;
    padding: 0;
  }

  /**
   * Address Firefox 4+ setting `line-height` on `input` using `!important` in
   * the UA stylesheet.
   */

  input {
    line-height: normal;
  }

  /**
   * It's recommended that you don't attempt to style these elements.
   * Firefox's implementation doesn't respect box-sizing, padding, or width.
   *
   * 1. Address box sizing set to `content-box` in IE 8/9/10.
   * 2. Remove excess padding in IE 8/9/10.
   */

  input[type="checkbox"],
  input[type="radio"] {
    box-sizing: border-box; /* 1 */
    padding: 0; /* 2 */
  }

  /**
   * Fix the cursor style for Chrome's increment/decrement buttons. For certain
   * `font-size` values of the `input`, it causes the cursor style of the
   * decrement button to change from `default` to `text`.
   */

  input[type="number"]::-webkit-inner-spin-button,
  input[type="number"]::-webkit-outer-spin-button {
    height: auto;
  }

  /**
   * 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome.
   * 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome
   *    (include `-moz` to future-proof).
   */

  input[type="search"] {
    -webkit-appearance: textfield; /* 1 */
    -moz-box-sizing: content-box;
    -webkit-box-sizing: content-box; /* 2 */
    box-sizing: content-box;
  }

  /**
   * Remove inner padding and search cancel button in Safari and Chrome on OS X.
   * Safari (but not Chrome) clips the cancel button when the search input has
   * padding (and `textfield` appearance).
   */

  input[type="search"]::-webkit-search-cancel-button,
  input[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
  }

  /**
   * Define consistent border, margin, and padding.
   */

  fieldset {
    border: 1px solid #c0c0c0;
    margin: 0 2px;
    @include padding(0.35em, 0.625em, 0.75em, 0.625em);
  }

  /**
   * 1. Correct `color` not being inherited in IE 8/9.
   * 2. Remove padding so people aren't caught out if they zero out fieldsets.
   */

  legend {
    border: 0; /* 1 */
    padding: 0; /* 2 */
  }

  /**
   * Remove default vertical scrollbar in IE 8/9.
   */

  textarea {
    overflow: auto;
  }

  /**
   * Don't inherit the `font-weight` (applied by a rule above).
   * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
   */

  optgroup {
    font-weight: bold;
  }

  /* Tables
     ========================================================================== */

  /**
   * Remove most spacing between table cells.
   */

  table {
    border-collapse: collapse;
    border-spacing: 0;
  }

  td,
  th {
    padding: 0;
  }


  // --------------------
  // custom reset
  // --------------------
  * {
   @include box-sizing(border-box);
  }

  div, span, applet, object, iframe,
  h1, h2, h3, h4, h5, h6, p, blockquote, pre,
  a, abbr, acronym, address, big, cite, code,
  del, dfn, em, img, ins, kbd, q, s, samp,
  small, strike, strong, sub, sup, tt, var,
  b, u, i, center,
  dl, dt, dd, ol, ul, li,
  fieldset, form, label, legend,
  table, caption, tbody, tfoot, thead, tr, th, td,
  article, aside, canvas, details, figcaption, figure,
  footer, header, hgroup, menu, nav, section, summary,
  time, mark, audio, video {
    margin: 0;
    vertical-align: baseline;
    border: 0;
    padding: 0;
    font-weight: 400;
  }

  abbr[title] {
    border-bottom: none;
    text-decoration: none;
    cursor: help;
  }

  strong, .emphasis {
    @extend %t-strong;
  }


  // --------------------
  // context base reset: edX LMS
  // --------------------
  // TODO: fill this in when xblock is rendered in edX LMS

  // --------------------
  // context base reset: LTI
  // --------------------
  // TODO: fill this in when xblock is rendered in LTI contexts
}
